Which sources do scientists use to study the interior of Earth? Check all that apply.

Sources of study of interior of earth:

Deep ocean drilling reveals humongous information through analysis of materials collected at different depth.

Volcanic eruption deliver information by the means of molten magma that comes out of Earth’s interiors.

Surface rocks are readily available earth material.

core samples

earthquakes

s-waves

rock composition

Explanation:

1. (1.2kw)x(15/60hours) = .3kwh --> a

2. (5kw)x(90/60hours)x(8cents/kwh) = $0.60 --> d

3. microwave --> 1200 watts = (1.2kw)x(6/60hours) = .12kwh

coffee-maker --> 900 watts = (.9kw)x(10/60hours) = .15kwh

therefore, it requires more energy for the coffee-maker to do the same amount of work.

so the answer is a.